Molding machine



Jul 1 192 1636 383 v y 9" 7 w. H. NlcHoLLs MOLDING MACHINEl Filed June 2o. 1925 2 sheets-sheet 2 INVENTOR ATFORNEYJ Patented July 19, 1927.

. UNITED STATES WILLIAM H. NIcHoLLs, or BROOKLYN. iiiiexiirroitk` y nonnina MACHINE.

Application flied :une 2o, 1925. serial No. 38,501. i

This invention relates to improvements in apparatus for formingv molds and has for its general object the provision of a'simple and inexpensive machine for jolting or jarring the sand in a fiask or flask member and then squeezing or compressing the sand about the pattern.

Another object of the invention is tok mount the jolting and squeezing mechanism tubular support, said support forming al large air reservoir from which airv is taken to operate the jolting and squeezing mechamsm., l f

`Another object of the invention is to mount the jolt-ing and squeezing mechanism and the -upper pressure head'so that they will'be-vertically and rotatively adjustable on the vertical tubular support.

Other objects and advantages of the invention will appear hereinafter.

In the drawings: A

Figure 1 is a front elevation of the machine; n

Fig. 2 a vertical central sectional' view thereof, parts being shown in side elevation;

Fig. 3 a horizontal sectional view taken on the line 3-3 of Fig. 1;

Fig. 4 a view similar to Fig. 3, takenon Fig. 5 a detail perspective view of the clamping ring which sustains the upper pressure head'in position; and I Fig. 6 a detail perspective view of the Aupper pressure head.

Referring to the various parts by numerals, 1 designates a tubular cylindrical standard which is closed at its upper end by a cap 2 and at its lower end'by a 'cap 3 said caps converting the vtubular standard into an air tight reservoir. The standard is preferably of considerable diameter in order that it may contain a considerable body of air under pressure, as will be hereinafter described. The lower end of the ustandard .is preferably embedded in concrete. Of course, the standard may be secured in aV verticalposition in any suitable manner. The base 4, which carries the jolting and squeezing pis'-y tons and the air control valve, is clamped to the standard 1 and is vertically and rotatively adjustable thereon. At one end the base is vformed with a semi-cylindrical vertical socket 5 adapted to Vreceive the cylindrical standard; `,and a semi-cylindrical clamp member 6 secures the base to the and the upper pressure head on a vertical standard. `The clamp member is formed with vvvertical side flanges/7 through which bolts 8 pass. These bolts also pass through the corresponding flanges 9 formed on the clamped at any desired height on the standard'and in any desired radial position with respect to the standard.` The clamp 6- will hold the base in any desired adjusted positiony on the standard. y ably' a hollow cylinder open at its upperend and closed at its lower end. A large hollow main squeeze piston 10 Vis adapted to reciprocate vertically in the cylindrical base; and said'piston is.` formed with a small central cylinder 11 whichf is `open at its upper end. The piston10 normally rests on the bottom "6o base .member of the clamp. The base maybe The base `vis preferwallet-'the cylinder base, its upper end pro- Y jectin'gV slightly above the base as shown clearly in Fig. 2.1 In thefwall of the cylinder 11. a short distance above the bottomvof said cylinder, is formedan exhaust opening 12 which leads into the interior vofthe piston 10, and-thence yto atmosphere, through apertures in the upper Wall ofsaidpiston. A

small jolt piston 13 is adapted to reciprocate vertically in the cvli'nder 11 relatively to the mainpiston-lO.A'The jolt pistonfcarries at its upper endV a"` pressure headand flask support14'. This'pressurehead is 4shown as rectangular inv plan l-viewfand extends outwardlybeyond the cylindrical portion of the base. vVhen the jolt piston is in its lowermost position the pressurehead 14 rests vdirectlyon the'upper surface of the main pis ton 10. The lower end of the jolt piston is open and at a'shortdistance upwardly from o said'lower end.k it isprovided with a cross Y wall? 15. yWVithWiu-the jolt piston is arranged anair pipe 16 whose lower open end extendsl through vthe cross wall 15 and whose upper end extends outwardlythrough the side vof the pressure headvand flasksupport 14. .An air supply pipe 17 enters the main cylinder through thebottom wall thereof and deliv ers'air into said 'cylinderbelow` the piston 10. The air-supply pipe .16 and 17 lead to an air control valve 18 which is supported on the base 4. Amain'air supply pipe 19 is connectedto `the interior of the tubular standard 1 `through thefuppercap 2. The lower part ofthe standard is connected to the air valve. through an air pipe 2O so that air for the operationv of the jolting and squeezing mechanism will be taken from the tubular standard. 'Thisfprov-ides a large volume of air directly adjacent the jolting and squeezing mechanism so that the air pressure for the operation of this mechanism will be maintained nearly uniform during the operations of the machine. It has been found that where the air for operating the jolting and squeezing mechanism is supplied through a small pipe a great variation in air pressure results. By drawing` the air from a comparatively large reservoir adja cent the molding machine much more uniform air pressures can be maintained at the apparatus.

The pressure head 14 is held against rotation and is guided in its vertical movement by a guide rod 21 which extends through and reciprocates in a vertical aperture in the base. This rod is provided with an adjustable stop collar 22 at its lower end which is adapted to engage the base to limit the upward movement of the pressure head in the mold squeezing operation. The stop collar preferably moves up into a vertical channel formed in the base and engages the upper wall of said channel to limit the upward movement of the pressure head. It is manifest that the base and all the parts carried thereby maybe adjusted vertically on the standard and horizontally around the standard without disturbing the operative relation of the parts. The valve 18 may be of any suitable construction but I prefer to use a single rotary valve such as that shown and described in my Patents No. 1,277,745, dated September 3, 1918, and 1,472,807 dated November 6, 1923. This single valve controls the supply of air to the jolt piston and also to the squeeze piston, as will be hereinafter described. The pipe is preferably flexible and of sufficient length to permit of any desired adjustment of the base on the standard 1.

The upper pressure head 23 is formed at one end with a tubular sleeve-like socket 24 adapted to lit the tubular standard. This socket is cut` out horizontally to form upper and lower members having a space between them. To sustain the upper pressure head on the tubular .standard and to resist upward pressure thereon I provide a clamp ring 25 which encircles the standard and fits between the upper and lower members of the socket 24. The clamp ring is provided with two outwardly extending flanges 26 through which clamping bolts 27 extend, said bolts clamping said ring rigidly to the standard between the upper and lower members of the socket 24. The socket 24 tits comparatively loosely around the standard so that the upper pressure head may be freely swung laterally and rotated about the standard in order to remove it from its normal position directlyover the pressure head 14. To limit the horizontal free rotative movement of the upper pressure head the clamp ring 25 is provided with two stop lugs 28 and 29. vThe upper pressure head is provided with two vertical stop flanges 30 and 31 which are adapted to engage the stops 28 and 29 ofthe clamp ring. These stops are so arranged that when the stop flange 30 is in engagement with the stop lug- 28 the upper pressure head is directly over the lower pressure head 14, as shown in Fig. 3. The stop 29 is so located on the clamp ring that when the upper 'pressure head is rotated on the standard to the position shown in dotted lines in Fig. 4 the said stop lug will be engaged by the stop flange 31. The clamp ring is adjustable around the standard to secure the correct positions for the stop lugs 28 and 29 and, of course, said stop lugs must be properly located with respectto the lower pressure head 14.' The -upper pressure head is formed with a central vertical strengthening web 32 in the outer end of which is formed a hand-hold 33 for the convenient manipulation of the head.

The tubular standard l is provided near its lower end-with a drainage cock 34 by means of' which any accumulatedv water may be drained from the reservoir, said cock being preferably located below the connection of air pipe 20.

To form a mold the flask and pattern are placed on thel head 14 and the fiask is then filled with sand. The valve handle if; then turned to permit air to flow from the reservoir formed by thestandard 1 through pipe 16 into the small cylinder 11 below the wall 15 of the jolt piston. The piston 13 and the head 14 will thus be elevated slightly until the exhaust port 12 is uncovered wheranipon the piston and the head will drop down to Y i the upper end of the main squeeze piston, this operationbeing repeated in rapid suecession as long as thecontrol valve is held in the position indicated. The sand in the mold frame is thus arrcd and evenly packed therein around the pattern. The sand' is then struck off level with the. top of the flask and the usual squeeze board placed in position. Thev handle of the air control valve is then turned to admit air to pipe 17 and 4 below the main squeeze piston 10. This forces the squeeze piston and the head 14 upwardly` forcing the squeezing` board into engagement with the upper pressure head 23. After the mold is squeezed the squeeze r piston may be lowered and the upper pres sure head swung to one side so that the mold may be conveniently removed from the head 14.

In setting up the machine the base is adjusted on the vertical standard to the proper height for convenient operation and is also adjusted rotatively on the standard to bring. the mechanism to the right position. The

upper pressure head is then mounted on the standardand adjusted to bring it into proper 'ill `the top ot the tubular standart.

any sudden material drop in air pressure during the operation of the machine.

lVhat I claim is: v

l. A molding machine comprising a vertical, cylindrical tubular standard forming an air reservoir, a mold jolting and squeezing'mechanism vertically and rotatively adjustable onsaid standard, an air control valve carried by said jolting and squeezing mechanism and controlling the supply of airI to-v said mechanism. an upper pressure Ahead rotatively mounted on the said standard above the jolting and squeezing` mechanism, vertically adjustable means Yfor sustaining` said upper pressure head on said standard, said sustaining means being rotatively adjustable on said standard and carrying stop lugs adapted to be engaged by stop fianges on thev pressure head to limit therotative movement of the upper' pressui'e head in both directions about the tubular standard, a main air supply pipe connected to the tubular standard, and an air pipe connected to the tubular standard and to the air control valve.

2. A molding machine comprising a vertical, cylindrical tubular standard forming an air reservoir, a mold squeezing mechanism vertically and rot-atively adjustable on said standard, an air control valve carried by said squeezing mechanism and controlling j the supply of air to said mechanism, an upper pressure head rotatively mounted on the said Standard above the squeezing mechanism, vertically adjustable means for sustaining said upper pressure head on said stand-V ard, said sustaining means being rotatively adjustable on said standard and carrying stop lugs adapted to be engaged by the pressure head to limit the rotative movement of the upper pressure head in both directions about the tubular standard, a main air supply pipe connected to the tubular standard` and an air pipe connected to the tubular standard and to the air control valve.A

3. A molding machine comprising a verti-` to4 the tubular standard, and an air pipe connected to the tubularstandard and tov the air control valve. f Y j w ,i 4. A molding machine comprising a vertical, cylindrical standard, a. mold jolting and squeezing mechanism vertically androtaj l tively adjustableI on said standard, an air control valve carried by said jolting .and squeezing mechanism and-controlling the supply of air tosaid mechanism,`,an Aupper pressure head rotatively mounted onthe said standard above the jolt-ing andsqueezing mechanisnn vertically adjustable meansrfor sustaining said upper pressure lhead on said standard, said sustaining means being rotatively adjustable on said stan dard :and carrying-stop lugs adapted to be engaged by the .pressurehead to limit the `rotative movement of the upper pressure head in bothdirections about the standard, and an air supply pipe connected to the air control Valve.

5. A molding machine comprising a vertical, cylindrical standard, a mold jolting and squeezing mechanism vertically andV rotatively adjustable on said standard, an air control valve carried by said jolting and squeezing mechanism and controllingV the supply ot' air to said mechanism, an upper pressure head rotatively mounted on the said standard above the jolting and squeezing mechanism, a vertically adjustable clamp ring for sustaining said upper pressure head ou said standard and resisting upward pres- Y sure on said head, said clamp ring being ro- Y tatively adjustable on said standard and carrying stop lugs adaptedk to be engaged by the pressure head to limit the rotative movement of the upper pressure head in both directions about the standard, and an air supply pipeconnected to the air control valve.

6. A molding machine comprising a vertical standard, a base, means carried at one end of the. base and adapted to clamp the base to the standard, said clamping means and the base being vertically adjustable on the standard, a jolt piston and a squeeze piston carried'by the base, a pressure head and vflask support'connected to the jolt piston and `normally resting on the top of the squeeze piston, a guide rod connected to said pressure head and movingvertically in an aperture in the base, a stop carried by said rod to limit the upward movement of said head,

an upper pressure head formed With a tubular socket at one end adapted to receive the Iii) standard and to permit the said upper head to rotate thereon, said pressure head exten-ding radially from the standard, a clamping ring adapted to be secured around the standard and to sustain the upper pressure head and to resist upward pressure onsaid head, said clamping ring being rotatively adjustable on the standard, a stop1 lug carried by the clamping ring and adapted to berengaged by the pressurehead to limit the free rotative movement of said upper head in one direction about the stan-dard7 an air control valve carried by the base, and an air supply pipe connected to said control valve.

7. A molding machine comprising a vertical standard. a base vertically adjustable on said standard, an air-operated mold jolting and .squeezing mechanism carried by said base and controlling the supply ot air to the said olting and squeezing mechanism, an upper pressure head rotatively mounted on the standard above the jolting and squeezing mechanism, vertically adjustable means for sustaining said upper pressure head on said standard, and means carried by the standard to be engaged by the pressure head to limitthe rotative movement of the pressure head in one direction about the standard.

8. A molding machine comprising a vertical standard, a base vertically and rotatably adjustable on said standard, an air-operated moldjolting and squeezing mechanism carried by said base and controlling the supply of air to the said jolting and squeezing mechanism, an upper pressure Vhead rotatively mounted on the standard above the jolting and squeezing mechanism, vertically adjustable means for sustaining said upper pressure head on said standard, and means carried by the standard to be engaged by the pressure head to limit the rotative movement of the pressure head in one direction about the standard.

In testimony whereof I hereunto aix my signature.

i WILLIAM H. NicHoLLs'. 

